Tucson pollen forecast — Arizona-Sonora Desert Museum neighborhood
Pollen Today
Today (20 September) pollen in Arizona-Sonora Desert Museum, Tucson is high; grass is high; mugwort and ragweed are moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week grass and mugwort will decrease; ragweed will remain stable.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | High | 51/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Moderate | 33/100 |
| Ragweed (Ambrosia) | Moderate | 44/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | None | 0/100 | — |
| Grass (Poaceae) | High | 56/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Moderate | 38/100 | |
| Ragweed (Ambrosia) | Moderate | 50/100 |
Local Environmental Conditions
Arizona-Sonora Desert Museum, best described as an open-air museum set among native Sonoran Desert cactus and scrub, follows Tucson's general vegetation pattern rather than a distinct local mix of its own. As with most sublevel sites, local landscaping can shift counts slightly from the citywide average.
Pollen season at Arizona-Sonora Desert Museum follows Tucson's regional pattern, opening with palo verde and mesquite from January then mulberry builds through February. Grass follows, peaking through March and April, while a second grass and weed peak follows the summer monsoon rains from July through September. Dry desert air lets pollen travel widely once released, with the spring peak the most intense stretch, which shapes conditions at Arizona-Sonora Desert Museum much as it does elsewhere in Tucson.
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Frequently Asked Questions About Pollen in Arizona
Is pollen high in Tucson right now?
On 20 September 2026, overall pollen levels in Tucson are high. Grass is the main contributor to airborne pollen, while ambrosia and artemisia remain at lower levels
Will pollen levels change in Tucson tomorrow?
On 21 September 2026, pollen conditions in Tucson will be similar to today, with ambrosia at moderate levels, artemisia at moderate levels, grass at high levels
Is pollen expected to decrease in Tucson this week?
According to the five-day outlook, artemisia and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Tucson?
On 20 September 2026, Grass is the dominant pollen source in Tucson. ambrosia and artemisia are also present but at lower levels.
When is pollen season in Tucson?
How often is the Tucson pollen forecast updated?
The Tucson pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Tucson come from nearby or far away?
Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.
Are pollen levels in Tucson based on measurements or forecasts?
Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.
Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Tucson, modern forecasts combine recent measurements, weather data, and information about local vegetation.
This allows us to estimate pollen levels for today and the coming days, not just report the past.
Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.
Understanding the Scale
The 0–100 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
